sand and gravel are the 'strength' of cement in the right proportions. Too much and it will be crumbly (not enough butter for the bread), and too little you'll end up with 'all glue' - which more watertight, but less strong.
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and just to add on to what you said concrete has a very high compression strength but no tinsel strength this is why they put re-bar in concrete
I use Portland cement and water no sand on a cinder block Grill I made it four years ago it's still standing strong I'm not sure what the long-term effect is but my opinion is at the Sand makes air pockets in the cement making it weaker, but sand gets you more for your money.
you would get cement not concrete, and I think it is kinda like plaster
cement is while its wet - after it chemically hardens it becomes concrete.
no cement, sand, and gravel, makes concrete when water is added. so if you don't put sand and gravel in it you will have cement. when concrete is wet it is just uncured concrete. I have worked with the stuff for two years now its not much time but enough to know that I am right. I don't mean to be rude so don't take it wrong I'm just stating the facts
I want to take your word, but that is not as I learned:
From the Merriam-Webster Online Dictionary:
"...a powder of alumina, silica, lime, iron oxide, and magnesium oxide burned together in a kiln and finely pulverized and used as an ingredient of mortar and concrete."
"...a hard strong building material made by mixing a cementing material (as portland cement) and a mineral aggregate (as sand and gravel) with sufficient water to cause the cement to set and bind the entire mass."
. hmmmmm All the cement defs I found with a Q&D; search only mention dry product. I only saw water used with the word concrete. But, popularly, cement is cement with or without water; at least around where I live. But I've often heard concrete and cement used interchangeably around here, too. :)
. Although it appears that technically cement is dry (I'm still not totally convinced), I couldn't figure out what else one would call cement with water but no aggregate.
the cement is what holds the aggrigate together - with or without aggrigate, once it hardents its concrete.
ya thats what I'm saying cement is a separate ingredient in the product concrete, concrete is a mixture of cement sand and gravel. I'm not saying what you said earlier is wrong I an saying you may have it misunderstood a bit. or I think we both have the same answer but just wording it differently.
nice lol and ya I do have a feeling we are trying to say the about same thing in different ways lol
no we're using different ways to say the same thing!
ya I was kinda noticing that. sorry about that
that same thing came to my attention ... apologies.
its all good at least we figured it out eh'
us being on the same page is a good thing....
Sorry - I cant stop parahprasing what you're saying - the same thing said differently....: )
no man its cool
I think you get something like grout but it wouldn't be strong if you are filling a large or thick gap. The aggregates(sand-gravel) are the ones that fill a gap and are bound together by the cement to make a strong block of concrete. Think of cement as just "rock glue".
. Yep.. http://en.wikipedia.org/wiki/Portland_cement. http://en.wikipedia.org/wiki/Portland_concrete